CN102891548A

CN102891548A - Stator for electric rotary machine

Info

Publication number: CN102891548A
Application number: CN2012102513347A
Authority: CN
Inventors: 壹岐友贵; 贵志武辉
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2011-07-21
Filing date: 2012-07-19
Publication date: 2013-01-23
Anticipated expiration: 2032-07-19
Also published as: JP2013027175A; US9362793B2; DE102012212701A1; US20130020890A1; CN102891548B; JP5389109B2

Abstract

The invention provides a stator (10) for an electric rotary machine which can be reduced in size by suppressing the projection of extending portions in the axial direction and which can enhance the performance thereof by suppressing the copper loss as a result of the length of the extending portions being reduced. The stator (10) includes: a stator core (21); and segmented coils (50) of a plurality of phases, wherein: the segmented coils (50) of a plurality of phases have pluralities of coil bars (25) which are inserted individually in a plurality of slots (23) in the stator core (21) and which extend substantially in a straight line and pluralities of connection coils (40) which connect together the coil bars (25) of the same phase to thereby make up extending portions; the connection coils (40) each comprise an inner connection coil (42) and an outer connection coil (41) which are disposed in different axial positions; and the inner connection coil (42) faces an outer connection coil (41) of a different phase in an axial direction and the outer connection coil (41) faces the inner connection coil (42) of a different phase in the axial direction.

Description

The stator of electric rotating machine

Technical field

The present invention relates to carry the stator of the electric rotating machine in electric motor vehicle, hybrid motor vehicle etc.

Background technology

At present, stator as the electric rotating machine of making of sectional coil, the known stator that following such electric rotating machine is arranged: after the multistage that will be made of the electric conductor that is configured as U word shape inserts to the groove of stator core, divide bending with shank, and the end of section is engaged with each other and consists of coil (for example, with reference to patent documentation 1,2).

[patent documentation 1] TOHKEMY 2003-158840 communique

No. 6894417 specification of [patent document 2] United States Patent (USP)

The stator of the automotive dynamoelectric machine that patent documentation 1,2 is put down in writing forms coil by the U word shaping processing of electric conductor, bending machining and end joint (welding) processing each other of shank.Therefore, the end of electric conductor is each other engaging to the state that axially stretches out, thereby stator becomes greatly in the axial direction because of transition part, and the length of transition part is elongated, has room for improvement.

Summary of the invention

The present invention proposes in view of above-mentioned problem, and its purpose is to provide a kind of stator of electric rotating machine, and it suppresses transition part can realize the miniaturization of stator to axial stretching out, and by making transition part length shorten to suppress copper loss, realizes the raising of performance.

To achieve these goals, a first aspect of the present invention provides a kind of stator (for example, the stator 10 in the execution mode described later) of electric rotating machine, and it possesses:

Stator core (for example, the stator core 21 in the execution mode described later) with a plurality of grooves (for example, groove 23 in the execution mode described later);

The polyphase winding of section (for example, the coil 50 in the execution mode described later), the stator of described electric rotating machine be characterised in that,

The polyphase winding of described section has in a plurality of grooves that are inserted into respectively described stator core and (for example is a plurality of coil bars (coil bar) that linearity roughly extends, coil bar 25 in the execution mode described later), the described coil bar of homophase is connected to each other and a plurality of connecting coils (connect coil) of consisting of transition part (for example, connecting coil 40 in the execution mode described later)

Each connecting coil possesses inboard connecting coil (for example, the inboard connecting coil 42 in the execution mode described later) and the outside connecting coil (for example, the outside connecting coil 41 in the execution mode described later) of the different in the axial direction position of configuration,

Each described inboard connecting coil is opposed in the axial direction with the outside connecting coil of other phase, and each described outside connecting coil is opposed in the axial direction with the described inboard connecting coil of other phase.

The stator of the electric rotating machine that a second aspect of the present invention relates to is characterized in that take the structure of first aspect as the basis,

Be provided with a pair of parent plate (for example,

parent plate

31L, 31R in the execution mode described later) in the both sides of described stator core,

At the opposed lateral surface of described parent plate (for example, lateral surface 35 in the execution mode described later) and medial surface (for example, medial surface 36 in the execution mode described later) (for example is formed with respectively a plurality of grooves on, lateral surface groove 37 in the execution mode described later and medial surface groove 38)

In the groove (for example, the lateral surface groove 37 in the execution mode described later) that described lateral surface forms, dispose described outside connecting coil,

The described inboard connecting coil of configuration in the groove (for example, the medial surface groove 38 in the execution mode described later) that described medial surface forms.

The stator of the electric rotating machine that a third aspect of the present invention relates to is characterized in that take the structure of first aspect or second aspect as the basis,

The coil bar that is inserted in each described groove possesses outside diameter coil bar (for example, the outside diameter coil bar 26 in the execution mode described later) and the internal side diameter coil bar (for example, the internal side diameter coil bar 27 in the execution mode described later) of radially arranging,

Described outside diameter coil bar be connected the distolateral and described outside connecting coil of the side in the internal side diameter coil bar and be connected, another distolateral and described inboard connecting coil is connected,

Described outside diameter coil bar be connected the distolateral and described inboard connecting coil of the opposing party in the internal side diameter coil bar and be connected, another distolateral and described outside connecting coil is connected.

The stator of the electric rotating machine that a fourth aspect of the present invention relates to is characterized in that take the structure of the third aspect as the basis,

The outside connecting coil of a distolateral connection of described outside diameter coil bar towards foreign side radially and along clockwise direction with counter clockwise direction in a side extend and be connected with the inboard connecting coil of homophase,

The inboard connecting coil of another distolateral connection of described outside diameter coil bar towards foreign side radially and along clockwise direction with counter clockwise direction in the opposing party extend and be connected with the outside connecting coil of homophase,

The inboard connecting coil of a distolateral connection of described internal side diameter coil bar towards foreign side radially and along clockwise direction with counter clockwise direction in the opposing party extend and be connected with the outside connecting coil of homophase,

The outside connecting coil of another distolateral connection of described internal side diameter coil bar towards foreign side radially and along clockwise direction with counter clockwise direction in a side extend and be connected with the inboard connecting coil of homophase.

The stator of the electric rotating machine that a fifth aspect of the present invention relates to is characterized in that take the structure of fourth aspect as the basis,

On described parent plate, the internal side diameter through hole that is configured in the same groove of described stator core and inserts respectively for described internal side diameter coil bar and outside diameter coil bar (for example, internal side diameter through hole 33 in the execution mode described later) and the outside diameter through hole (for example, outside diameter through hole 32 in the execution mode described later) radially arranges formation

The inboard connecting coil and the outside connecting coil that are connected respectively with each described outside diameter coil bar form along involute curve,

The inboard connecting coil and the outside connecting coil that are connected respectively with each described internal side diameter coil bar form along involute curve, and get around described outside diameter through hole and radius vector is extended to foreign side at the internal side diameter of this involute curve from described internal side diameter through hole.

The structure of the stator of the electric rotating machine that a sixth aspect of the present invention relates to either side in the 3rd～the 5th aspect is characterized in that as the basis,

Described outside diameter coil bar and described internal side diameter coil bar have same length.

The structure of the stator of the electric rotating machine that a seventh aspect of the present invention relates to either side in the first～the 6th aspect is characterized in that as the basis,

Described a plurality of connecting coil is configured in the zone that described stator core is obtained to axis projection.

The invention effect

According to a first aspect of the invention, the coil bar transition part connected to one another of homophase is made of the inboard connecting coil and the outside connecting coil that configure different in the axial direction positions, transition part can be suppressed thus to axial stretching out, thereby the miniaturization of stator can be realized.And, shorten to reduce copper loss by the length that makes transition part, the efficient of electric rotating machine is improved.

According to a second aspect of the invention, inboard connecting coil and outside connecting coil efficient under the state that is insulated by parent plate configures diverse location in the axial direction well, can make the stator miniaturization, and can improve the assembleability of the coil of section.

According to a third aspect of the invention we, can with the outside and inboard connecting coil with the form of wavy coiling be connected from the extended two coil bars of groove.

According to a forth aspect of the invention, can with the outside and inboard connecting coil radial outside be connected from the extended coil bar of groove, can be easily at the inboard of stator configuration rotor, and can connecting coil be connected with the coil bar with the form of wavy coiling.

According to a fifth aspect of the invention, inboard connecting coil and outside connecting coil can not interfere with each other in parent plate, can reduce their occupied area.

According to a sixth aspect of the invention, outside diameter coil bar and internal side diameter coil bar are same length, thereby can realize the parts sharing of coil bar.

According to a seventh aspect of the invention, can realize the miniaturization that the footpath of stator makes progress, and can be easily at the inboard of stator configuration rotor.

Description of drawings

Fig. 1 is the stereogram of the stator of the electric rotating machine that the present invention relates to.

Fig. 2 is the exploded perspective view of stator shown in Figure 1.

Fig. 3 (a) is the exploded perspective view of a side's shown in Figure 2 parent plate assembly, (b) is the exploded perspective view of the opposing party's parent plate assembly.

Fig. 4 is the stereogram of coil bar.

Fig. 5 is the longitudinal section of stator shown in Figure 1, is the A-A line cutaway view of Fig. 6.

Fig. 6 is the front view of the parent plate assembly of the side shown in Fig. 3 (a).

Fig. 7 is the rearview of the parent plate assembly of the side shown in Fig. 3 (a).

Fig. 8 is the stereogram of polyphase winding of the section of dual-trench type.

Fig. 9 takes out the coil of amount of a phase and the stereogram that illustrates from polyphase winding shown in Figure 8.

Figure 10 is the schematic diagram of the structure of expression polyphase winding.

Figure 11 (a) is the partial enlarged drawing of Fig. 6, (b) is the B-B line cutaway view of (a).

Figure 12 (a) is expression coil bar and connecting coil are processed the state that engages by riveted joint schematic diagram, (b) being that the expression end forms that hemispheric coil bar is pressed into connecting coil and the schematic diagram of the state that engages, (c) is that coil bar that the expression end forms the cross section rectangle of semicircle shape is pressed in the hole of connecting coil and the schematic diagram of the state that engages.

Figure 13 is the stereogram that is equipped with the stator of coldplate in the side of parent plate assembly.

Figure 14 is the major part longitudinal section that possesses the stator of coldplate shown in Figure 13.

Figure 15 is the stereogram of coil of amount of a phase of the single groove-type coil of expression.

Figure 16 is the stereogram of coil of amount of a phase of expression three groove-type coils.

Symbol description:

The stator of 10 electric rotating machines

20 stator core assemblies

21 stator cores

23 grooves

25 coil bars

26 outside diameter coil bars

27 internal side diameter coil bars

28 insulating material

30L, 30R parent plate assembly

31L, 31R parent plate

32 outside diameter through holes

33 internal side diameter through holes

35 lateral surfaces

36 medial surfaces

37,37a lateral surface groove (groove)

38,38a medial surface groove (groove)

40 connecting coils (transition part)

41,41a, 41b outside connecting coil (transition part)

42, the inboard connecting coil (transition part) of 42a, 42b

50 coils

50U U phase coil

50V V phase coil

50W W phase coil

Embodiment

Below, based on accompanying drawing, embodiments of the present invention are described.Need to prove, accompanying drawing is observed along the direction of symbol.

Such as Fig. 1, Fig. 2 and shown in Figure 5, the stator 10 of the electric rotating machine of present embodiment possesses stator core assembly 20, a pair of

parent plate assembly

30L, 30R,

parent plate assembly

30L, 30R configuration and be assembled in the both sides of stator core assembly 20.Between stator core assembly 20 and

parent plate assembly

30L, 30R such as disposing the insulating trip 65 such as silicon chip, with stator core assembly 20 and

parent plate assembly

30L, 30R insulation.

Stator core assembly 20 possesses stator core 21, a plurality of (in the execution mode shown in the figure being 48) coil bar 25.

Stator core 21 is for example by consisting of many silicon steel plates after the stamping-out processing are stacked, possesses 48 teeth 22, is formed on 48 grooves 23 between the

adjacent tooth

22,22 at the radially inner side of stator core 21.Groove 23 forms along the axial perforation of stator core 21, forms in the footpath of stator core 21 upwards long roughly oblong shape during from end on observation, and peristome 24 is to the inner peripheral surface opening of stator core 21.

Also with reference to Fig. 4, the outside diameter coil bar 26 of coil bar 25 by will having same shape and same length and internal side diameter coil bar 27 stagger the vertically amount of thickness of connecting coil 40 described later and side by side configuration, and except two ends on every side by the insulating material such as resin 28 coverings of injection molding forming and form.Particularly, the length setting of outside diameter coil bar 26 and internal side diameter coil bar 27 is thickness and the length about equally with axial length and three connecting coils 40 of stator core 21, is formed with

minor diameter part

26a, 27a with the thickness length about equally of connecting coil 40 at external diameter lateral coil bar 26 and internal side diameter coil bar 27 two ends separately.

As shown in Figure 5, a plurality of (in the execution mode shown in the figure being 48) the coil bar 25 that is made of outside diameter coil bar 26 and internal side diameter coil bar 27 becomes in 48 grooves 23 that the mode of foreign side radially is inserted into respectively stator core 21 with external diameter lateral coil bar 26 and along the circumferential array of stator core 21, consists of stator core assembly 20.

Outside diameter coil bar 26 is inserted in the groove 23 as follows, namely, minor diameter part 26a is from the thickness of a side's of stator core 21 outstanding about two connecting coils 40 of end face 21a (being the left side among Fig. 5), and minor diameter part 26a is from the thickness of the opposing party's the outstanding about a slice connecting coil 40 of end face 21b (being the right side among Fig. 5).

And, internal side diameter coil bar 27 is inserted in the groove 23 as follows, that is, minor diameter part 27a is from the thickness of a side's of stator core 21 the outstanding about a slice connecting coil of end face 21a, and minor diameter part 27a is from the thickness of the opposing party's outstanding about two connecting coils of end face 21b.Between the groove 23 of external diameter lateral coil bar 26 and internal side diameter coil bar 27 and stator core 21, accompany and cover two

coil bars

26,27 insulating material 28, guarantee the insulation of outside diameter coil bar 26 and internal side diameter coil bar 27 and stator core 21.Thereby outside diameter coil bar 26 and internal side diameter coil bar 27 are covered by insulating material 28 under the state that the different mode of axial location with separately both ends staggers vertically.

The insulating material 28 that covers outside diameter coil bar 26 and internal side diameter coil bar 27 has slightly larger than groove 23 and roughly the same with groove 23 shape, can be easily fixing to groove 23 by being pressed into.And outside diameter coil bar 26 and internal side diameter coil bar 27 are thicker than the coil that existing winding by reeling consists of, and therefore also have the effect that improves to the duty factor (Japanese: Zhan Plot leads) of groove 23.

To shown in Figure 7, the parent plate assembly 30L, the 30R that are configured in respectively the both sides of stator core assembly 20 possess

parent plate

31L, 31R and a plurality of connecting coil 40 such as Fig. 1.Need to prove, parent plate assembly 30R is except the shape that does not possess splicing ear section's this point described later and groove and connecting coil, and other structure is identical with parent plate assembly 30L, therefore mainly parent plate assembly 30L is described later.

Such as Figure 6 and Figure 7, parent plate 31L is by the ester moulding with insulating properties, and has the roughly circular member with stator core 21 internal-and external diameter about equally, and upper section is provided with radius vector and is the 31a of expansion section that fan-shaped is extended to foreign side in the drawings.Be formed with the splicing ear section that is connected for external equipment etc. at the 31a of expansion section.

The internal side diameter of parent plate 31L be formed with in the mode that connects parent plate 31L with the groove 23 that is inserted into stator core 21 in the outside diameter coil bar 26 of each coil bar 25 and internal side diameter coil bar 27 respectively corresponding 48 pairs of outside diameter through holes 32 and internal side diameter through hole 33.

Paired outside diameter through hole 32 and internal side diameter through hole 33 are positioned on the same straight line L that radially extends from the center O of parent plate 31L, and, on this straight line L and the outside diameter of parent plate 31L also be formed with periphery side opening 34, the lateral surface 35 of parent plate 31L is communicated with medial surface 36 (with reference to Fig. 5).And at the circumferential locations place that is formed with the 31a of expansion section, the foreign side place is formed with 12 splicing ear conjugate foramens 39 that are positioned at the 31a of expansion section more leaning on radially than the position of periphery side opening 34.

To shown in Figure 7, roughly a plurality of (48) lateral surface grooves 37 and the medial surface groove 38 of コ type closely are formed on the lateral surface 35 and medial surface 36 of parent plate 31L in a circumferential direction along involute curve in the cross section of the outside side 35 of difference and medial surface 36 openings such as Fig. 5.Reach between each lateral surface groove 37 adjacent one another are between each medial surface groove 38 and isolate by erect the wall 31b that arranges from parent plate 31L, and opposed in the axial direction lateral surface groove 37 is isolated by next door 31c with medial surface groove 38, thereby is electrically insulated from each other.

And, parent plate 31L sets axial width as follows for, this axial width be substantially equal to the lateral surface groove 37 corresponding with the thickness of the outside described later connecting coil 41 groove depth, with the summation of the thickness of the groove depth of medial surface groove 38 corresponding to the thickness of inboard connecting coil 42 described later and next door 31c.

As shown in Figure 6, in parent plate assembly 30L, each lateral surface groove 37 of parent plate 31L forms along the involute curve bending in the mode of connecting external diameter side through hole 32 with periphery side opening 34 main looking under the observation, wherein, described periphery side opening 34 is formed on the straight line L of the outside diameter through hole 32 by having left along clockwise direction three intervals from above-mentioned outside diameter through hole 32.Wherein, in a plurality of lateral surface grooves 37 towards 12 lateral surface groove 37a that the 31a of expansion section extends extend to with being the involute shape straight line L of the outside diameter through hole 32 by having left along clockwise direction three intervals from outside diameter through hole 32 upper till, be connected with splicing ear conjugate foramen 39 to bending radially afterwards.

In addition, as shown in Figure 7, each medial surface groove 38 of parent plate 31L is looked the mode that bending is connected so that internal side diameter through hole 33 and periphery side opening 34 are avoided outside diameter through hole 32 under the observation the master and is formed, and wherein said periphery side opening 34 is formed on by (being viewed as counterclockwise from Fig. 6 side) on the straight line L of the internal side diameter through hole 33 that has left three intervals along clockwise direction from above-mentioned internal side diameter through hole 33.Wherein, in a plurality of medial surface grooves 38 towards the similarly bending of 12 medial surface groove 38a that the 31a of expansion section extends extend to upper by the straight line L that (is viewed as counterclockwise) along clockwise direction the internal side diameter through hole 33 that has left three intervals from internal side diameter through hole 33 from Fig. 6 side till, afterwards to radially crooked and be connected with splicing ear conjugate foramen 39.

That is, as shown in Figure 6, be positioned at along clockwise direction outside diameter through hole 32 and the internal side diameter through hole 33 of position that (or counterclockwise) left six intervals via lateral surface groove 37 and medial surface groove 38 shared continuous periphery side openings 34 and be connected.And the outside diameter through hole 32 that one pair of outer side groove 37a and the medial surface groove 38a that is connected with the splicing ear conjugate foramen 39 that shares will be along clockwise direction (or counter clockwise direction) has left six intervals is connected with internal side diameter through hole 33.

Need to prove, in parent plate assembly 30R, each lateral surface groove 37 of parent plate 31R has the shape same with each medial surface groove 38 of above-mentioned parent plate 31L, and each medial surface groove 38 of parent plate 31R has the shape same with each lateral surface groove 37 of above-mentioned parent plate 31L.

Connecting coil 40 is formed tabular by electric conducting materials such as copper, can be divided into the outside connecting coil 41 (41a, 41b) that is inserted into respectively among lateral surface groove 37, the 37a, be inserted into inboard connecting coil 42 (42a, 42b) among medial surface groove 38, the 38a respectively.Need to prove, here said connecting coil 41 refers to become the connecting coil 40 in the axial outside of stator 10 when assembling stator core assembly 20 with parent plate assembly 30, and inboard connecting coil 42 refers to become the connecting coil 40 of the axial inboard of stator 10.

As shown in Figure 6, outside connecting coil 41a is formed with combined

hole

43a, 43b along with the identical shaped involute curve of lateral surface groove 37 and form at its both ends.Combined hole 43a has the minor diameter part 26a diameter about equally with outside diameter coil bar 26, and combined hole 43b has and connecting pin 45 diameter about equally that outside connecting coil 41a is connected with inboard connecting coil 42a described later.And outside connecting coil 41b is bent to form with the shape identical with lateral surface groove 37a, is formed with combined hole 43a and splicing ear hole 43c at its both ends.

As shown in Figure 7, inboard connecting coil 42a is formed with combined

hole

44a, 44b along with the identical shaped involute curve of medial surface groove 38 and form at its both ends.Combined hole 44a has the minor diameter part 27a diameter about equally with internal side diameter coil bar 27, and combined hole 44b has and connecting pin 45 diameter about equally.And inboard connecting coil 42b is bent to form with the shape identical with medial surface groove 38a, is formed with combined hole 44a and splicing ear hole 44c at its both ends.

Thereby, except the part of the splicing ear conjugate foramen 39 of parent plate 31L, form along involute curve with inboard connecting coil 42a and outside connecting

coil

41a, 41b that each outside diameter coil bar 26 is connected respectively, form along involute curve with inboard connecting

coil

42a, 42b and outside connecting coil 41a that each internal side diameter coil bar 27 is connected respectively, and at the internal side diameter of this involute curve, get around outside diameter through hole 32 and radius vector is extended to foreign side from internal side diameter through hole 33.

Outside connecting

coil

41a, 41b are inserted into respectively among lateral surface groove 37, the 37a, and inboard connecting

coil

42a, 42b are inserted into respectively among medial surface groove 38, the 38a.And the connecting pin 45 that inserts the conductivity that is made of copper, aluminium etc. in each periphery side opening 34 is electrically connected outside connecting coil 41a with inboard connecting coil 42a.

Thus, be positioned at along clockwise direction (or counterclockwise) and left formation

parent plate assembly

30L, 30R under combined hole 43a and the state that the combined hole 44a of inboard connecting coil 42a is electrically connected via outside connecting coil 41a, connecting pin 45 and inboard connecting coil 42a of outside connecting coil 41a of position at six intervals.

Need to prove, also can replace as the present embodiment connecting pin 45 is set, and the either party in outside connecting coil 41a and inboard connecting coil 42a forms the protuberance with connecting pin 45 equal shapes, and this protuberance is inserted among combined hole 43b, the 44b that the opposing party in outside connecting coil 41a and inboard connecting coil 42a arranges, thus outside connecting coil 41a is electrically connected with inboard connecting coil 42a.

The a pair of parent plate assembly 30L that consists of like this, 30R bond-allocating assemble to the assigned position of the both sides of stator core assembly 20.As shown in Figure 5, in the parent plate assembly 30L of a side's of stator core 21 end face 21a side (left side among the figure) configuration, be inserted among the combined hole 43a of outside connecting

coil

41a, 41b at the minor diameter part 26a of external diameter lateral coil bar 26, and after the minor diameter part 27a of internal side diameter coil bar 27 was inserted among the combined hole 44a of

inboard connecting coil

42a, 42b, riveted joint was fixing respectively.That is, outside connecting

coil

41a, 41b and inboard connecting

coil

42a, 42b are connected to each other the coil bar 25 of homophase (for example U phase) and consist of the transition part of coil 50.

And, in the parent plate assembly 30R of the opposing party's of stator core 21 end face 21b side (right side among the figure) configuration, be inserted among the combined hole 44a of inboard connecting coil 42a at the minor diameter part 26a of external diameter lateral coil bar 26, and after the minor diameter part 27a of internal side diameter coil bar 27 was inserted among the combined hole 43a of outside connecting coil 41a, riveted joint was fixing respectively.That is, outside connecting

coil

41a, 41b and inboard connecting

coil

Therefore, for outside diameter coil bar 26 and internal side diameter coil bar 27 in being configured in same groove 23, the outside connecting coil 41a that connects in one distolateral (left side among the figure) of external diameter lateral coil bar 26 is towards foreign side radially and extend along clockwise direction and is connected with the inboard connecting coil 42a of homophase, and the inboard connecting coil 42a that connects on another distolateral (right side among the figure) of external diameter lateral coil bar 26 is towards foreign side radially and in the counterclockwise direction extension and being connected with the outside connecting coil 41a of homophase.And, the inboard connecting coil that connects in one distolateral (left side among the figure) of internal side diameter coil bar 27 is towards foreign side radially and extend in the counterclockwise direction and is connected with the outside connecting coil 41a of homophase, and the outside connecting coil 41a that connects on another distolateral (right side among the figure) of internal side diameter coil bar 27 is connected with the inboard connecting coil 42a of homophase towards radially foreign side and along clockwise direction extension.

Like this, stator 10 consists of by assemble a pair of parent plate assembly 30L, 30R in the both sides of stator core assembly 20, and the coil 50 of section forms each four the coil loop (U phase coil 50U, V phase coil 50V and W phase coil 50W) mutually with same structure thus.This each four coil loop (U phase coil 50U, V phase coil 50V and W phase coil 50W) is take two coil loop as one group mutually, and two groups of U phase coil 50U, two groups of V phase coil 50V and two groups of W phase coil 50W be waveform reel (with reference to Fig. 8 and Figure 10) successively in the counterclockwise direction.Need to prove, be configured in a groove 23 outside diameter coil bar 26 and internal side diameter coil bars 27 interior and that covered by insulating material 28 and consisted of by two coil loop that consist of a group.Fig. 8 is the stereogram that illustrates from heterogeneous (U, V, the W phase) coil of stator taking-up section for the ease of understanding, Fig. 9 further takes out the coil of amount (for example U phase) of a phase and the stereogram that illustrates, Figure 10 is the schematic diagram that expression consists of the structure of polyphase winding, Figure 11 (a) is the partial enlarged drawing of Fig. 6, and Figure 11 (b) is the B-B line cutaway view of (a).

And in the stator 10 that consists of like this, outside connecting

coil

41a, 41b and inboard connecting

coil

42a, 42b are configured in the zone that stator core 21 is obtained to axis projection, and the different in the axial direction position of configuration.

B-B line section place at the parent plate assembly 30L shown in Figure 11 (a), shown in Figure 11 (b), on the lateral surface of parent plate 31L, radially foreign side at the minor diameter part 26a of the outside diameter coil bar 26 of U phase, the outside connecting coil 41b of two V phases is arranged in order from radially inner side with W outside connecting coil 41b mutually, on the medial surface of parent plate 31L, the inboard connecting coil 42b of a U phase is arranged in order from radially inner side with two W inboard connecting coil 42b mutually.Thereby, as can be known clear and definite from Figure 11 (a), each inboard connecting

coil

42a, 42b are opposed in the axial direction with outside connecting coil 41a, the 41b of other phase, and each outside connecting

coil

41a, 41b are opposed in the axial direction with inboard connecting coil 42a, the 42b of other phase.

And being configured in the lateral surface of a plurality of outside connecting

coil

41a, 41b in the axial outside of stator 10 and the end face of

parent plate

31L, 31R becomes the same face.

And, as shown in Figure 5, coil 50 is with the end face 21a side a side of stator core 21, the outside connecting coil 41a, the 41b that are connected with outside diameter coil bar 26 are positioned at the axial outside, and in the opposing party's of stator core 21 end face 21b side, the outside connecting coil 41a that is connected with internal side diameter coil bar 27 is positioned at the mode in the axial outside and assembles stator 10.

Figure 12 is the concept map of the syndeton of expression coil bar and connecting coil, below describes as an example of external diameter lateral coil bar 26 example, but can be suitable for too for internal side diameter coil bar 27.Outside diameter coil bar 26 shown in Figure 12 (a) is formed with the tapering 26b towards the tip taper of front end at its both ends, and the combined hole 44a of the combined hole 43a of outside connecting

coil

41a, 41b and inboard connecting coil 42a is the taper hole that has with outside diameter coil bar 26 gradient about equally.Outside diameter coil bar 26 is connected in the following way with connecting coil 40: at stator core 21 assembling

parent plate

31L, 31R, and under the effect of the elastic force of spring 64, by the pressing member 61 of anchor clamps connecting coil 40 is pressed vertically with respect to outside diameter coil bar 26, make thus two taperings 26 of combined hole 43a, the 44a of connecting coil 40 and outside diameter coil bar 26 chimeric.Then, utilize drift 62 that the both ends conquassation of outside diameter coil bar 26 is riveted, thus that coil bar 26 is fixing with connecting coil 40.

At this moment, outside diameter coil bar 26 forms taper with the fitting portion of connecting coil 40, even therefore between external diameter lateral coil bar 26 and connecting coil 40, have a little core shift, also can make outside

diameter coil bar

26 and 40 pairs of hearts of connecting coil by pressing of pressing member 61, thereby engage reliably and conducting at tapering 26b.And, can utilize stamping procedure to carry out the joint of many places (being 96 places in the present embodiment), can effectively engage processing, production efficiency is improved significantly.Need to prove, coil bar 25 and connecting coil 40 may not be connected by being pressed into and riveting, and also can connect by being pressed into or riveting.Below, the connection of being undertaken by being pressed into is described.

The both ends of the outside diameter coil bar 26 shown in Figure 12 (b) form hemispherical, and combined hole 43a, the 44a of connecting coil 40 are hemispherical recesses, the hemispherical both ends of outside diameter coil bar 26 are pressed among combined hole 43a, the 44a of connecting coil 40 and outside diameter coil bar 26 is engaged with connecting coil 40.In this structure, outside diameter coil bar 26 can be by carrying out core the heart with connecting coil 40.And, can utilize stamping procedure to carry out the joint of many places, can extremely effectively engage.

Outside diameter coil bar 26 shown in Figure 12 (c) forms the cross section rectangular shape, and its both ends form semicircle shape.And combined hole 43a, the 44a of connecting coil 40 also is same semicircle shape recess, is pressed into the end of outside diameter coil bar 26 and engages at combined hole 43a, the 44a of this semicircle shape recess.Need to prove, the outside diameter coil bar 26 of present embodiment forms the cross section rectangular shape, for being similar to the square shape of groove 23, therefore can also improve the duty factor of groove 23.

Figure 13 is the stereogram that is equipped with the stator of coldplate in the side of parent plate assembly, and Figure 14 is the major part longitudinal section of stator.In Figure 13 and the stator 10 shown in Figure 14, a pair of coldplate 60 contacts configuration with parent plate assembly 30 on the two sides that are arranged on stator 10.Be formed be used to the refrigerant passage 63 that makes refrigerant circulation in the inside of coldplate 60, by making cold-producing medium that illustrated refrigerant supplying device pressure never transports for example along arrow C direction (with reference to Figure 13) circulation, can cool off energetically stator 10 via outside connecting coil 41a, the 41b (transition part) of the stator 10 that contacts with a pair of coldplate 60 thus.

And because the side of outside connecting

coil

41a, 41b is the plane, therefore outside connecting

coil

41a, 41b contact with 60 of coldplates.Therefore, compare with the existing coil that is wound with winding, with the contact area of coldplate 60 be that heat transfer area is large, can effectively cool off.

And, in the coil 50, end face 21a side a side of stator core 21, the outside connecting coil 41a, the 41b that are connected with outside diameter coil bar 26 are positioned at the axial outside, and in the opposing party's of stator core 21 end face 21b side, the outside connecting coil 41a that is connected with internal side diameter coil bar 27 is positioned at the axial outside, therefore via outside connecting

coil

41a, 41b outside diameter coil bar 26 and internal side diameter coil bar 27 cooled off equably, thus the heat distribution of inhibition coil.And, the impact that does not exist the oil worried in the oil cooled situation that the ATF wet goods is sprayed to cool off to coil that coil or insulating material are caused, reliability, durability are improved.

As discussed above, the stator 10 that present embodiment relates to possesses the polyphase winding 50 of stator core 21 and section, and polyphase winding 50 has in a plurality of grooves 23 that are inserted into respectively stator core 21 and is a plurality of coil bars 25 that linearity roughly extends and the coil bar 25 of homophase is connected to each other and consists of a plurality of connecting coils 40 of transition part.Each connecting coil 40 possesses inboard connecting coil 42 and the outside connecting coil 41 of the different in the axial direction position of configuration, each inboard connecting coil 42 is opposed in the axial direction with the outside connecting coil 41 of other phase, each outside connecting coil 41 is opposed in the axial direction with the inboard connecting coil 42 of other phase, therefore coil bar 25 transition parts connected to one another with homophase configure different in the axial direction positions, thereby can suppress transition part to axial stretching out, can realize the miniaturization of stator 10.And, can suppress copper loss by shortening transition part length, the performance of electric rotating machine is improved.

And, be provided with a pair of

parent plate

31L, 31R in the both sides of stator core 21, on the opposed lateral surface 35 of

parent plate

31L, 31R and medial surface, form respectively a plurality of grooves 37,38.In the lateral surface groove 37 that lateral surface 35 forms, dispose outside connecting coil 41, in the medial surface groove 38 that medial surface 36 forms, dispose inboard connecting coil 42, therefore transition part efficient under the state that is insulated by

parent plate

31L, 31R configures different in the axial direction positions well, stator 10 miniaturizations can be made, and the assembleability of the coil 50 of section can be improved.

And, be inserted into outside diameter coil bar 26 and internal side diameter coil bar 27 that coil bar 25 in each groove 23 possesses radially assortment, one of outside diameter coil bar 26 distolaterally is connected with outside connecting coil 41, another distolateral and inboard connecting coil 42 is connected, one distolateral and inboard connecting coil 42 of internal side diameter coil bar 27 is connected, another is distolateral to be connected with outside connecting coil 41, therefore can with outside diameter and inboard connecting

coil

41,42 with the form of wavy coiling be connected from groove 23 extended two

coil bars

26,27.

In addition, outside diameter coil bar 26 and internal side diameter coil bar 27 are connected with the outside connecting coil 41 in the axial outside that is positioned at stator 10 in the either party's of stator core 21 side.Thus, the heat that stator 10 produces dispels the heat via outside connecting coil 41, thereby can cool off equably outside diameter coil 26 and internal side diameter coil bar 27.Need to prove, if make coldplate 60 contact configuration with the outside connecting coil 41 in the axial outside that is positioned at stator 10, then can more effectively cool off stator 10.

And, the outside connecting coil 41 of a distolateral connection of external diameter lateral coil bar 26 towards foreign side radially and along clockwise direction with counter clockwise direction in a side extend and be connected with the inboard connecting coil 42 of homophase, the inboard connecting coil 42 of another distolateral connection of external diameter lateral coil bar 26 towards foreign side radially and along clockwise direction with counter clockwise direction in the opposing party's extension and be connected with the outside connecting coil 41 of homophase.And, the inboard connecting coil 42 of a distolateral connection of internal side diameter coil bar 27 towards foreign side radially and along clockwise direction with counter clockwise direction in the opposing party extend and be connected with the outside connecting coil 41 of homophase, the outside connecting coil 41 of another distolateral connection of internal side diameter coil bar 27 towards foreign side radially and along clockwise direction with counter clockwise direction in side extension and be connected with the inboard connecting coil 42 of homophase.Thus, can radial outside with the outside and inboard connecting

coil

41,42 be connected from groove 23 extended coil bars 26,27, can easily at the inboard of stator 10 configuration rotor, can connecting coil 40 be connected with coil bar 25 with the form of wavy coiling.

And, on

parent plate

31L, 31R, radially arrange formation in the same groove 23 interior configurations of stator core 21 and internal side diameter through hole 33 and the outside diameter through hole 32 that supplies internal side diameter coil bar 27 and outside diameter coil bar 26 to insert respectively, the inboard connecting coil 42 and the outside connecting coil 41 that are connected respectively with each outside diameter coil bar 26 form along involute curve.And, the inboard connecting coil 42 and the outside connecting coil 41 that are connected respectively with each internal side diameter coil bar 27 form along involute curve, and get around outside diameter through hole 32 and radius vector is extended to foreign side at the internal side diameter of this involute curve from internal side diameter through hole 33, therefore inboard connecting coil 42 and outside connecting coil 41 can not interfere with each other in

parent plate

31L, 31R, can reduce their occupied area.

And outside diameter coil bar 26 and internal side diameter coil bar 27 are same length, thereby can realize the parts sharing of coil bar 25.

And a plurality of connecting coils 40 are configured in the zone that stator core 21 is obtained to axis projection, therefore can realize the miniaturization radially of stator 10, and, can be easily at the inboard of stator 10 configuration rotor.

Need to prove, the present invention is not limited to above-mentioned execution mode, can suitably be out of shape, improvement etc.

For example, in the above-described embodiment, be formed with 12 splicing ear conjugate foramens 39, but be not limited to this, also can form six splicing ear conjugate foramens 39, the connecting coil of adjacent homophase is connected to each other.

And, can be at the cover of the axial outside of a pair of

parent plate assembly

30L, 30R configuration insulating properties, also can be with coverings such as resins.

Need to prove, stator 10 of the present invention is not limited to above-mentioned dual-trench type, also can be the stator of single grooved of the coil shape of the amount of a phase shown in Figure 15, perhaps can also be the stator of three grooveds of the coil shape of the amount of a phase shown in Figure 16.In the waveform winding stator of the three-phase ends of the earth, in the situation of the stator of single grooved, the groove number of stator core 21 is 24, and in the situation of the stator of three grooveds, the groove number of stator core 21 is 72.

Claims

1. the stator of an electric rotating machine, it possesses:

Stator core with a plurality of grooves;

The polyphase winding of section,

The stator of described electric rotating machine is characterised in that,

The polyphase winding of described section has in a plurality of grooves that are inserted into respectively described stator core and is a plurality of coil bars that linearity roughly extends, the described coil bar of homophase is connected to each other and consists of a plurality of connecting coils of transition part,

Each described connecting coil possesses inboard connecting coil and the outside connecting coil of the different in the axial direction position of configuration,

2. the stator of electric rotating machine according to claim 1 is characterized in that,

Be provided with a pair of parent plate in the both sides of described stator core,

On the opposed lateral surface of described parent plate and medial surface, be formed with respectively a plurality of grooves,

In the groove that described lateral surface forms, dispose described outside connecting coil,

The described inboard connecting coil of configuration in the groove that described medial surface forms.

3. the stator of electric rotating machine according to claim 1 and 2 is characterized in that,

The coil bar that is inserted in each described groove possesses outside diameter coil bar and the internal side diameter coil bar of radially arranging,

4. the stator of electric rotating machine according to claim 3 is characterized in that,

5. the stator of electric rotating machine according to claim 4 is characterized in that,

On described parent plate, the same groove internal side diameter through hole and the outside diameter through hole interior and that supply described internal side diameter coil bar and outside diameter coil bar to insert respectively that are configured in described stator core are radially arranged formation,

6. the stator of each described electric rotating machine is characterized in that according to claim 3～5,

7. the stator of each described electric rotating machine is characterized in that according to claim 1～6,